膨润土对白云鄂博铁精矿球团矿生球及成品球强度影响  

Effect of bentonite on strength of raw pellets and finished pellets prepared from Baiyun Obo iron concentrate

作　　者：李志超 王宇[2] 柴轶凡[1] 王艺慈[1] 罗果萍[1] 宋希文[1,3] LI Zhi-chao;WANG Yu;CHAI Yi-fan;WANG Yi-ci;LUO Guo-ping;SONG Xi-wen(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,Nei Mongol,China;Ironrnaking Plant,Baotou Steel Union Co.,Ltd.,Baotou 014010,Nei Mongol,China;Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices,Baotou 014010,Nei Mongol,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古包钢钢联股份有限公司炼铁厂,内蒙古包头014010 [3]内蒙古自治区先进陶瓷材料与器件重点实验室,内蒙古包头014010

出　　处：《中国冶金》2021年第4期19-24,共6页China Metallurgy

基　　金：国家自然科学基金资助项目(51904161);内蒙古自治区自然科学基金资助项目(2019LH05006);内蒙古自治区高等学校科学研究资助项目(NJZZ9123)。

摘　　要：膨润土主要作为黏结剂用于球团矿生产过程以提高球团矿强度,不同膨润土对球团矿生球及成品球强度有不同的影响。在测定两种膨润土的理化性能和化学成分基础上,将其与白云鄂博铁精矿混合造球,试验测定生球及焙烧后的成品球强度。分析可知,膨润土中胶质价含量越高,白云鄂博铁精矿球团矿生球强度越大;膨润土的吸水率高有利于提高球团矿生球抗压强度和落下强度;膨润土中的SiO2可以促进球团矿中硅酸盐生成,提高其成品球强度。Bentonites are mainly used as a binder in the production process of pellets to increase the strength of pellets. Different bentonites have different effects on the strength of the green pellets and finished pellets. Based on the determination of the physical-chemical properties and chemical composition of the two kinds of bentonites, they were mixed with Baiyun Obo iron concentrate to prepare the pellets, and the strength of the green pellets and finished pellets after calcination was determined experimentally. The analysis showed that the higher the content of the colloidal in the bentonite, the stronger the green pellets and finished pellets. The high water absorption rate of bentonite was beneficial to improve the compressive strength and falling strength of pellets. The SiO2 in bentonite can promote the formation of silicate in the pellets and improve the strength of the finished balls.

关 键 词：白云鄂博铁精矿 球团矿 膨润土 抗压强度 落下强度 

分 类 号：TF046.6[冶金工程—冶金物理化学]